Eccentric-reversing gear.



E. SCHNEIDER.

. ECCENTRIC REVERSING GEAR.

APPLICATION FILED FEB. 14. I918.

Patented Aug. 6, 1918.

. cation.

EUGENE SCHNEIDER, or PARIS, FR NC I EccENTRIc-REvERsme GEAR.

To all whom it may concern Be it known that I, EUGENE SoHnnroEe, a citizen of the French Republic, and a-.res1 dent of 42 Rue dAnjou, Paris, France, have invented new and useful Improvements in Eccentric-Reversing Gear, which invention isfully set forth in the following specifi- .This invention hasfor its object to provide animproved eccentric reversing gear suitable for actuating. slide valves, engines, pumps andfor other purposes.v

- improved meanswhich will allow of reversing ina simple and rapid manner the angle, of the eccentric, actuating a. slidevalve or the like relatively to the shaft driven by the motoror the pump, and from which the eccentric rod receives its motion.

According to thisinvention the eccentric sheave, instead of being-fixed on its driving shaft, is loose on said shaft, whichllatter slidable longitudinally with relation to the eccentric sheave. The eccentricsheave carries'two engaging parts formed in or on its two respective ends, preferably at equidistantand diametrally opposite points. The said driving shaft has formed on or init two engaging members adapted to cooperate with one or the other of the engaging membersformed on-the eccentric sheave, the en gagement between an engaging. member of the shaft and an engaging member of the eccentric sheave being effected by suitably sliding the driving shaft in the requisite direction and. rotating the said shaft through the desired reversing angle. distance apart of the two engaging members on the driving shaft corresponds to the angle necessary for reversing the angular position of the eccentric.

For the purpose of facilitating the driving of the eccentric sheaves in the direction of the motion of the driving shaft when two cooperating engaging members are in engagement, without allowing too great a strain upon the said cooperating members, the eccentric sheave is provided with two oppositely directed stops projecting one from each disk of the eccentric sheave. A tappet projecting from the support of each of the cooperating engaging members carried by the driving shaft is adapted to bear against the stop formed on the corresponding eccentric sheave disk. The said stops on the eccentric sheave disks may be located at Specification of Letters Patent.

The lIlVQIIlJlOILCQIlSLSlZS 1 n providing an- The angular points diametrally opposite to, the correspending engaging members. The engagementbetween the said tappet and the corresponding stop is designed to take place at the same instant as engagement takes. placebetween the corresponding cooperating engaging members. I I

. A practical embodiment of this invention is illustratedby way of example in the a c 'companying drawings in which: I .F'gure 1 is a longitudinal section. partly in elevation of i the improved gear taken along the axis of the slidable driving shaft. I Fig. 2 is a cross section on the line 11-11 of Fig.1.. I I

Fig. 3 is a cross section on: the line IIIIII of Fig. 1. I

,Inthe example shown, A indicates a slidevalvethat is suitably guided in such a. manner as to be capableofrbeing actuated by the rod B of the eccentric strap C embracing an.

eccentric sheave E. I I

According to this invention the'eccentric sheave E is loose on the driving shaft D which is longitudinally slidable by any suit able means (not shown) in bearings d,,cl and al in relation to the eccentricsheave E. TheIsheave E may be prevented from receiving any longitudinal motion by means of one of the central bearings 03 The sheavecarries two engaging membcrs such as the recesses c ande? formed respectively 1n :the disks E jandjE at points preferably equidistant from thesce'nters of said} disks and located 'diametrally opposite each other.' F and I V are supports. keyed ,by 'means of keys 7. f on the driving shaft D;

they are located one on each side of the eccentric sheave E. These supports carry each a projecting engaging member, such as a spring bolt G G respectively. The angular distance between the two bolts is equal to the angle through which it is necessary to reverse the eccentric in order to change from forward running to backward running and vice versa. 7

At a point diametrally opposite the respective recess 6 6 each of the disks E, E

of the eccentric sheave carries a stop 72, 72.

At a point diametrally olpposite the respec= tive bolt G G each of t Patented Aug. 6, 1918. :Application filed February 14,1918: Serial Nammoa.

e supports F F keyed on the shaft 1) carries a tappet 9 g V respectively.

I In the figures the engaging members are shown in the positions they occupy when the eccentric is fixed relatively to the driving shaft D, or. more strictly speaking when the eccentric sheave E has been moved into the position for forward running. The axial distance between the supports F and F is such as to allow of a suitable extent of sliding movement of the shaft D for the purpose of disengaging one of the bolts, for in; stance the bolt G and siibsequently engaging the other bolt, for instance the bolt G When this displacement effected, the bolt G is first disengaged so that the eccentrio she'ai 'e is then free. Immediately afterwai dhowever, and as soon as the bolt G is rotated withthe shaft D, through the reversing angle a, the said bolt G will engage the recess 6 and. the engagement of thetappet g with the stop 7L will assure the engagement between the said bolt and its recessat the proper moment, and will relieve the said bolt and said recess from all shearing strain during their engagement.

1; In eccentric reversing gear, the combination of a rotating driving shaft longitu dii'lally slidabl'e in both directions in its bearings, a rotatable eccentric loose on said shaft, two disks fixed one to each end of said eccentric, two. engaging members carried one by each of said disks, two supports fixed on said shaft, one outside each of said disks, and two engaging members carried one by each of said supports and spaced apart at the desired reversing angle, whereby on sliding said shaft inthe required direction so as to engage one, or the other of said engaging members with the engaging member of the corresponding eccentric disk,

' the said eccentric sheave is reversed as desired. I i I 2.f In eccentric reversing gear, the combination; of arotating driving shaft longitudin'ally slidable in both directions in its bearings, a rotatable eccentric loose on said chines of this pas-1a may he seemed in shaft, two disks fixed one to each end of said eccentric, two recesses formed one in each of said disks, two supports fixed on said shaft, one j ontside each of said disks, and two projecting members carried one by each of said supports, and spaced apart at the desiredreversingangle, whereby on sliding said shaft in 'tlie required direction soras to engage one or the other of said projecting members into the corresponding recess of the correspoiidinge'clcentric disk, the said eccentric sheave revel' s'e'd as desired. v a

3; In eccentric reversing gear, the combination o'f a rotating driving shaft lOngitiic inally slidable in both" directions in its bearings, a rotatable eccentric loose on shaft, two disks fixed one to each erid of said eccentric, two engaging'niembers carried one byeaoh of said disks, twozsupports fixed on said shaft, one outside each of disks, two engaging members carried one by each of 'supports'and' spaced apart at the desired reversingangle, two 'projed s ee ri by as o an s n w dr v ng projections cooperating therewith carried by each of said supports, spaced apart at the reversing angle, whereby on sliding the required direction five sets each, by martian the camnieemr of mass;

manages, D. u 

